Attachment-plug.



G. W. GOODRIDGE.

ATTACHMENT PLUG. APPLICATION FILED JAN.28, 1913.

1,079,235. Patented Nov. 18, 1913.

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GILBERT W. GOODRIDGE, 0F BRIDGEPORT, CONNECTICUT, ASSIGNOR T0 THE BRYANT ELECTRIC COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

ATTACHMENT-PLUG.

Specification of Letters Patent.

Patented Nov. 18, 1913.

To all whom it may concern:

Be it known that I, GILBERT W. GooDRIneE, a citizen of the United States of America, and residing at Bridgeport, in the county of Fairfield and Stateof Connecticut, have invented acertain new and useful Improvement in Attachment-Plugs, of which the following is a specification.

My invention relates to attachment plugs and particularly to plugs of the screw shell type, the object of my invention being to provide an etiicient and inexpensive device of this character possessing certain novel characteristics.

In the accompanying drawing, Figure 1 is a side elevation of an attachment plug embodying my invention in one form; Figs. 2 and 3 are respectively top and inverted plan thereof; F ig. 4 is a vertical section on the line 4 4, Fig. 3; Figs. 5 and 6 are respectively perspective views of the center and side contacts of the plug.

The present plug, 1n the exemplary form of my invention shown in the drawings, comprises a one-piece body 10 of insulating material, carrying at its entering end'the center contact 11 and the screw shell side contact 12. The outer end is preferably rovided with an enlarged head 13 perlpherally tinted at 14 to a'ord means for firmly gripping the plug. A central well 15 formed in the head ofthe plug to receive the lead wires, communicates with the assages 16-17 which extend longitudinally through the plug to permit the bared ends 'of the wires to be carried through to the side and center contacts respectively.

The connection between the lead wires and the contacts of the present plug, is established by soldering. To this end soldering wells 18%-19 are formed into which the passages 16 and .17 respectively open, and with which the center and shell contacts are in electrical connection. Thus the center contact may comprise an angled strap, one end ofwhich forms the center contact plate 11 which is connected by the shank 20 to the off-set base 21 which lies in the bottom of the Well 18 and is held in position by a hollow rivet E22, the upper end of which is spread above the shoulder 23 formed in the passage 16. Lugs 24 on the plate 11 enter recesses in end of the plug and aid in holding the center contact strap in position.

The side contact screw shell 12 is crimped at one end into the annular recess 25 formed in the body of the porcelain, and at the other end over the annular' shoulder 26. A lug 27 is angled down into the solder well 19 and the hollow rivet 28 holds it in position. Obviously the annular shoulder 26 may be omitted at the well 19, since the downwardly pressed lug forms an outer wall 29 for the well which sufficiently retains the solder. The portion of the shell adjacent the well 18 is cut away at 30 so that the plug may not be' short circuited by accidental contact between the solder in the well 18 and the shell 1Q.

To wire the plug it is necessary merely to bare the ends of the wires, push them through the two passages, bend them over into the bottoms of the solder wells and low acouple of drops of solder into each well. It will be noted that the wells are symmetrically arranged on opposite sides of the plug and are ofa depth sufficient to hold enough solder to aiford a joint of sufficient mechanical strength with the bared wire ends to meet all ordinary demands upon the plug.

Many modifications ot' construction will readily suggest themselves and I do not limit my invention to the precise structure shown.

I claim as my invention 1. An attachnlent plug having an insulating body recessed at its entering end to form soldering wells, side and center contacts mounted on said body, electrical connections between said wells and contacts, said body being chambered at its outer end to receive a wire cable and longitudinally perforated to form independent open passages connecting said chamber with the soldering wells, through which passages leading-in wires may be readily introduced to said soldering wells, substantially as described.

Q. An attachment plug having a body of insulating material recessed at its entering end to form a soldering well to one side of the axis of said plug, and a center' contact member having a portion axially arranged on said entering end of the plug and an angled strap extending therefrom into said soldering well to establish electrical con- 

